Matthew Calderbank

The intrepid explorers posted a video on YouTube documenting their exploits inside the abandoned Pennine Tower at Lancaster Services on the M6.

The unusual hexagonal concrete tower on the M6 Northbound side of the services has been closed to the public for 30 years.

But the explorers have shone a light on the forgotten world inside the grade-II listed building with a revealing video tour.

Posted on YouTube, the video follows the exploits of two men, known as Ben and Jordan. The pair have a large online following after sharing their daring explorations of abandoned places in the UK and Europe.

Opened in 1965 as Forton Services, and designed to resemble an Air Traffic Control Tower, the landmark previously housed an up-market restaurant and sun deck before closing in 1989.

The ten-minute video is the first look inside the concrete landmark in decades and reveals how the explorers breached security and accessed the off-limits tower.